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Old 31st May 2007   #1
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Sychost.exe takes 100% CPU


Sychost.exe takes 100% CPU.
This problem occurs upon starting the computer and slows everything down.
From time tio time the computer becomes very slow and Task Manager shows sychost.exe taking 90% to 100% CPU.

Suggestions to improve the situation will be most welcome.
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Old 31st May 2007   #2
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Clive RH
Welcome to WindowsBBS Forums !!
-----------------------------------------
First, let's check your spelling ...
You stated sychost.exe.
If above is true, very likely you are infected.
If you are infected, read this and post in this forum.

If the correct spelling is svchost.exe, we will need additional info.


Last edited by Dennis L; 31st May 2007 at 17:35.
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Old 31st May 2007   #3
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Clive RH - Welcome to the Board

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Old 31st May 2007   #4
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Sychost.exe takes 100% CPU


Hi,
Thanks for suggesting that the name should be svhost.exe, which upon closer inspection I find that it is.
Now we know this, what additional info is required please?
Thanks,
Clive RH

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Old 31st May 2007   #5
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Quote from MS ...
Quote:
At startup, Svchost.exe checks the services part of the registry to construct a list of services that it must load. Multiple instances of Svchost.exe can run at the same time. Each Svchost.exe session can contain a grouping of services. Therefore, separate services can run, depending on how and where Svchost.exe is started.
To view and or post a list of what is running within the file, read this provided by Computerhaven.

Before you post a load list, we need a beter understanding of the following phrase(s)..
(A) This problem occurs upon starting the computer and slows everything down.

(B) From time to time the computer becomes very slow and Task Manager shows sychost.exe taking 90% to 100% CPU.

Phrase (A)
We need a approximate time in seconds this activity lasts. Depending on how old of a computer, how much memory you running, and how many processes are listed in Task manager can dramatically influence this time value . Also, some services may require "update checks" via internet .. are you on dialup or broadband service.

Phrase (B)
Does this occur when you do certain activities, example "Printing" or other hardware devices loaded. If yes, how long. Again, we could be at a resource thresh hold or their may be a real problem.

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Old 31st May 2007   #6
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sychost.exe takes 100% CPU


Hi Dennis,
Many thanks for your reply. The first reply to my query suggested that I download 'RegCure' which claims to be 'free' and 'svhost.exe' specific. I downloaded the program and it performed a scan. 1137 'problems' were found. I was asked to 'register' at which point money was asked for around $29. Mmmm...not to 'free' then? I'm new to 'the board' so perhaps I should have realised that it was an advert!

I next received your message and the questions it poses. Here are some answers that may help:
The slow-down / sluggsh problem is persistant for around 20 mins after switch-on. It can re-occur but at no specific point or with no specific task - it appears to be random - or at least to me.
The computer is a few years old maybe 4 to 5.
Hard Drive is 20gb
Free Space is 4gb
Memory is 512mb using Pentium III, 107mhz
Format: NTFS
At present, 'Task Manager' lists some 50 activities to which can be added around 6 for svhost.exe

Does any of this help?

Any opinion re the RegCure program?

Many thanks,
Clive RH

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Old 31st May 2007   #7
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Old 31st May 2007   #8
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I suggest you forget RegCure and download a trial of jv16PowerTools - it is not a crippled trial like so much other trial software, but fully functional. It is rated among the best and the Registry Cleaner is straightforward to use - always accept the offer to make a backup of what is fixed/removed

BTW - do you have Office on that box?

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Old 31st May 2007   #9
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sychost.exe takes 100% CPU


Hi PeteC,
Yes I do run 'Office'. Does this make a difference?
Cheers,
Clive.

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Old 31st May 2007   #10
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Possibly - the URL posted by segejames references Office Update as being a possible culprit ....
Quote:
The problem seems to occurs on PCs that have Microsoft Office installed. The actual cause of the problem is likely Windows Update Agent trying to scan for Windows Installer updates. A simple way to test whether this is the case is to use Windows XP Process Explorer, a free utility from Microsoft.

If Windows Update Agent is the problem, when the system locks up, you will see the Windows Update Client (WUAUCLT and maybe Update) listed in the Process Explorer. Apparently scanning for Office updates is a CPU-intensive task.
Would you check this please.

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Old 2nd June 2007   #11
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Sychost.exe takes 100% CPU


Thanks for the help.
I've downloaded and used jv 16 Power Tools and cleaned the registry.

I need to use the system for a while to see if things have improved.

One thing though, I notice that when I drag a 'window' or 'dialogue box' around the screen , it leaves a 'trail' over any open 'window' or 'box' below. Looks like a graphic card error(?) - Strange thing is, that before the registry clean this wasn't happening.

Should I worry? Is there anything that I can do? Any suggestions?

Cheers,
Clive RH.

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Old 2nd June 2007   #12
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I have seen those trails related to memory usage.

When you get to the desktop or you start seeing the trails, look at the performance tab in Task Manager and check that the Physical Memory -> Available is not dropping very low and the Page File Usage is increasing. (You can also watch the CPU Usage there).

If you have 50 processes running at the desktop, half of those will probably be unnecessary.

Matt

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Old 3rd June 2007   #13
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Sychost.exe takes 100% CPU


Hi Mattman,
Thanks for ther advice, Il keep an eye on what's occuopying space in Task Manager.

Cheers,
Clive RH

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Old 9th June 2007   #14
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Any progress?

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Old 9th June 2007   #15
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Had the same problem. Before you tinker with your system to much, Check Microsoft. They have an issue with their new update all programs fuction. It can cause this problem. There is a fix posted on their site. Solved my problem.

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